Laboratory glass joint



FIG. 1 is a top perspective view of a laboratory glass joint showing mynew design in assembled condition;

FIG. 2 is a side elevation view thereof;

FIG. 3 is an exploded side elevational view thereof, in disassembledcondition and in quarter section taken along line 3--3 of FIG. 4;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof.

The ornamental design for a laboratory glass joint, as shown anddescribed.